JP3565754B2 - Oil fence structure of the rotary crusher - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called oil fence structure for preventing a lubricating oil from scattering in a swiveling crusher for crushing a crushed object between a mantle subjected to a turning operation and a bowl liner fixed to a body frame.
[0002]
[Prior art]
The rotary crusher is disclosed in Japanese Utility Model Laid-Open No. 2-133434, Japanese Patent Laid-Open No. 4-305257, and the like. One example will be described with reference to FIGS. 1 to 3 showing an embodiment of the present invention. A main shaft 7 having a mantle door 8 is eccentrically and inclinedly slidably fitted to the vertical rotation shaft 4 provided on the body frame 1, and the mantle 9 of the mantle door 8 is inserted into the body frame 1. The mantle core 8 is rotated and rotated through the main shaft 7 by the rotation of the rotary shaft 4 to crush between the mantle 9 and the bowl liner 10 (see FIG. 1). See Examples for details).
[0003]
In this rotary crusher, a support 16 of an upper concave spherical surface 16a is provided on the frame 1 so as to tilt and rotate the mantle core 8, and the lower surface of the mantle core 8 is fitted to the concave spherical surface 16a. The sphere 8a is formed on the spherical surface 8a, and the spherical surfaces 8a and 16a are fitted to each other, and the mantle core 8 is supported by the support 16 so as to be tiltable and rotatable (rotatable). The lubricating oil a is supplied to the sliding surfaces (fitting surfaces) 8a and 16a of the two 8 and 16 so that the lubricating oil a is supplied so as to prevent abrasion of the lubricating oil and smooth the sliding. (See Examples).
[0004]
Conventionally, as shown in FIG. 4, a dustproof wall 50 is provided below the outer peripheral edge of the mantle door 8 in order to prevent abrasion of sliding parts such as the sliding surfaces 8a and 16a of the mantle door 8 and the support 16. Is provided. The dustproof wall 50 includes a dustproof ring 51 fixed to the outer peripheral edge of the mantle door 8, a ring-shaped disk 52 fixed to the lower outer periphery of the spherical support 16, and a pair of inner and outer vertical plates screwed to the disk 52. 53 and a flexible ring (dust seal ring) 54 screwed to each vertical plate 53 and in contact with the dust-proof ring 51, and compressed into a space s surrounded by the paired vertical plate 53 and the flexible ring 54. This is to supply air.
[0005]
[Problems to be solved by the invention]
In the above-mentioned rotary crusher, the mantle door 8 does not always rotate smoothly. For example, when a crushed object P that is large and hard to be crushed is introduced, a large compressive force acts on the crushed object P. Then, the mantle door 8 receives a large downward force (unbalanced load) only around the crushed object P, so that the mantle door 8 is slightly lifted up on the opposite side, and is interposed between the mantle door 8 and the spherical support 16. There is a gap. When the object to be crushed P is crushed, the unbalanced load disappears and the gap between the mantle door 8 and the spherical support 16 disappears, and the floating mantle door 8 comes into close contact with the spherical support 16. The oil that has lubricated the surface is pushed out by the mantle door 8 and jumps out of the gap that is not completely closed. The splashed oil collides with the dust-proof ring 51 and returns to the sump chamber Q by the inverted conical ring portion 51a.
[0006]
However, since the dust-proof ring 51 rotates and rotates, centrifugal force acts outward on the oil that has collided with the dust-proof ring 51. Therefore, the oil that has reached the lower end of the inverted conical ring portion 51a rises on the outer slope against the gravity. A flexible ring 54 for preventing oil leakage and dust intrusion is in contact with this slope, so that oil leakage can be reduced. However, in a long-term operation, a considerable amount of oil is consumed. It will leak. Further, the flexible ring 54 is fixed to the spherical support 16 via the circular plate 52 and the vertical plate 53. If a gap is formed between the mantle core 8 and the spherical support 16, the flexible ring 54 is connected to the inverted conical ring portion 51 a. A gap is also formed between the flexible ring 54 and the gap, and when this gap is formed, the oil easily leaks.
[0007]
In order to prevent this oil leakage, there is a case in which a metal ring-shaped fence 55 is screwed to the upper outer peripheral edge of the spherical support 16 as shown in FIG. However, although the fence 55 is in contact with the lower surface of the mantle door 8, it is not flexible because it is made of metal, and cannot sufficiently close the gap due to the uneven load, thereby reliably preventing oil from escaping. There is no fact.
[0008]
Incidentally, if the flexible ring 54 is urged by a coil spring with reference to the technique described in Japanese Patent Application Laid-Open No. 2-133434, the generation of the gap can be prevented and the leakage of oil can be reduced. Although it was considered possible to do so, it was not possible to prevent oil leakage to a satisfactory state.
[0009]
The lubricating oil a is used in a circulating manner as described above, and if the oil leaks out, the circulating oil must be replenished, and the oil may adhere to the product and its quality may be deteriorated. .
[0010]
An object of the present invention is to effectively prevent oil from scattering from between a mantle door and a spherical support under the above circumstances.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides elasticity to an oil fence provided on the spherical support so that the elastic fence follows vertical movement of the mantle door due to the offset load. is there. By following this, the gap between the mantle core and the spherical support due to the unbalanced load is always closed, and oil leakage is prevented as much as possible.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
As an embodiment of the present invention, a mantle core is eccentrically attached to a vertical rotation shaft provided on the body frame to be rotatable, and a support body that supports the mantle core with a spherical surface is provided on the body frame, Further, a bow liner is attached to the body frame so as to face the mantle of the mantle door, and the rotation of the rotation shaft causes the mantle door to swing and rotate, thereby crushing between the mantle and the bowl liner. In the crusher, an oil fence is attached around the entire surface of the spherical support, and the upper end of the oil fence is in contact with the convex spherical surface of the mantle door, and has elasticity in the contact direction, so that the oil fence has an elasticity in the contact direction. A configuration is adopted in which the contact state is maintained following movement.
[0013]
The elasticity in the contact direction is such that the oil fence is made of an elastic material such as a rubber plate and the upper edge of the fence is bent in an arc shape so as not to separate from the mantle door in the gap due to the above-mentioned eccentric load. A fence can be attached to give the elasticity, but even if the oil fence is made of metal as well as elastic material, the means of urging with a spring is generally used, and the life is long and the structure is simple. .
[0014]
As a specific example of the spring structure, an annular ring is fixed around the entire lower edge of the cylindrical annular body over the entire periphery of the spherical support, and the annular ring is vertically movable on the outer peripheral surface of the spherical support. A configuration is adopted in which a spring for urging the annular ring upward is provided between the annular ring and the spring seat of the spherical support while being fitted.
[0015]
With this configuration, the upper end of the annular plate forming the oil fence is always in contact with the convex spherical surface of the mantle door by a spring, and the annular ring is fitted to the spherical support so as to be vertically movable, so that the annular body is also smooth. The lubricating oil smoothly follows up and down movements of the mantle door to reliably close the gap due to the unbalanced load, thereby effectively preventing the lubricating oil from splashing outward.
[0016]
【Example】
An embodiment of the present invention is shown in FIGS. 1 to 3, in which 1 is an airframe composed of an upper frame 2 and a lower frame 3. The lower frame 3 is provided at the center thereof with a cylindrical portion 5 for slidably holding the rotary shaft 4 and a hollow holding portion 6 for holding the outer periphery of the cylindrical portion 5 at four locations. Reference numeral 47 denotes a rotating body which is a mantle door 8 fitted and fixed to the main shaft 7 and an upper half thereof, and a mantle 9 is placed on the upper surface of the mantle door 8. Reference numeral 10 denotes a bowl liner for crushing an object to be crushed with the mantle 9, and is fixed to the inner surface of the upper frame 2 via an elevating cylinder 21.
[0017]
The rotary shaft 4 has an axially inclined hole 11 formed therein, into which the lower half of the main shaft 7 is rotatably inserted. The rotating shaft 4 is supported by a bearing 12 disposed at a lower portion of the inner surface of the cylindrical portion 5 and receives rotation via a pulley 13 externally fitted to a lower end thereof. Reference numeral 14 denotes an inner bush fitted externally to the lower half of the main shaft 7, and reference numeral 15 denotes an outer bush fitted externally to the rotary shaft 4.
[0018]
The mantle core 8 has a convex spherical surface 8 a at the bottom surface, and is rotatably supported by a spherical support 16 fixed to the upper surface of the cylindrical portion 5. Further, the mantle door 8 has a skirt portion 17 formed on an outer peripheral edge thereof, and an annular dustproof ring 18 is fixed thereto. An annular dustproof wall 19 is erected on the upper surface of the periphery of the cylindrical portion 5, and the seal ring 20 above the dustproof wall 18 is in contact with the dustproof ring 18.
[0019]
An elevating cylinder 21 is provided inside the upper frame 2, and an annular hydraulic chamber 22 is provided between the elevating cylinder 21 and the upper frame 2. In the illustrated example, an annular convex portion 23 is formed on the outer surface of the elevating cylinder 21, and the hydraulic chamber 22 is divided into an upper hydraulic chamber 24 and a lower hydraulic chamber 25 by the convex portion 23.
[0020]
An oil fence 26 is provided around the spherical support 16 (see FIG. 3). The oil fence 26 has a number of coil springs (springs) 27 attached thereto, and the springs 27 are sandwiched between a lower ring (spring seat) 28 and an upper ring 29. The upper ring 29 is fitted on the outer periphery of the lower portion of the spherical support 16 so as to be vertically movable. The lower ring 28 is fixed to the lower surface of the spherical support 16 with screws. Is fixed, and the top surface (upper end) of the annular plate 30 is in contact with the lower surface 8 a of the mantle door 8 by the urging force of the spring 27. The number of the springs 27 is appropriately arranged in the circumferential direction.
[0021]
An annular notch 31 is formed on the outer periphery of the spherical support 16, and a small gap 42 is formed above the notch 31 between the annular plate 30 and the outer peripheral surface of the spherical support. . Further, the spherical support 16 has an annular oil groove 32 formed in the vicinity of the outer periphery of the upper surface thereof, an upper communication hole 33 communicating the oil groove 32 and the notch 31, and a lower communication downward from the notch 31. Holes 34 are respectively formed.
[0022]
The seal ring 20 is made of metal, and its upper part is bifurcated to form a space 35 surrounded by the dust-proof ring 18. The dustproof wall 19 has a large number of coil springs 36 built therein, and urges the seal ring 20 upward, that is, toward the dustproof ring 18. An air inlet (not shown) is provided at one location on the lower surface of the dust-proof wall 19, and the air introduced from the air inlet can be blown out of the space 35. In the drawing, reference numeral 48 denotes a hopper for charging the crushed material P.
[0023]
This embodiment is configured as described above. Next, the operation will be described. By rotating the rotating shaft 4, the mantle 9 is rotated and rotated, and the crushed object P is crushed between the mantle 9 and the bow liner 10. The gap between the mantle 9 and the bowl liner 10 is adjusted by the hydraulic pressure in the hydraulic chamber 22.
[0024]
The lubricating oil a is supplied from an oil supply hole 38 of a bottom cover 37 that closes the bottom surface of the cylindrical portion 5, lubricates the bearing 12, and reaches an oil chamber 39 formed at the bottom of the inclined hole 11. Then, the outer surface of the inner bush 14 is lubricated and rises to the oil chamber 40 formed inside the spherical support 16.
[0025]
A portion of the lubricating oil a that has reached the oil chamber 40 descends while lubricating the outer surface of the outer bush 15, and is discharged from a discharge hole 41 formed in the cylindrical portion 5. The remaining lubricating oil a lubricates the boundary surfaces 16 a and 8 a between the spherical support 16 and the core portion 8 and collects in the oil groove 32, descends through the communication hole 33, the notch 31, and the communication hole 34, and forms In the oil storage chamber 43. Then, the air enters the hollow portion 6a in the hollow holding portion 6 through the communication hole 44, and is discharged from the discharge hole 45 below the hollow portion 6a.
[0026]
In this rotational crushing, as described above, a large unbalanced load is generated at the time of crushing, and the mantle core 8 slightly lifts up, and a gap is formed between the mantle core 8 and the spherical support 16. However, even if this gap is formed, the annular plate 30 surrounding the spherical support 16 is kept in contact with the lower surface of the mantle door 8 by the urging force of the coil spring 27. For this reason, the lubricating oil a which has protruded from the boundary surfaces 8a, 16a between the mantle core 8 and the spherical support 16 collides with the annular plate 30 provided immediately nearby, and travels along the inner wall surface of the annular plate 30 to form the notch. Fall to 31. Thereafter, the air is discharged from the communication hole 34 via a normal path.
[0027]
At this time, the lower surface of the mantle door 8 becomes wet with oil, and even if the annular plate 30 is in contact with the mantle door 8, a part of the oil is removed there due to the centrifugal force caused by the rotating rotation of the mantle door 8. Thus, it goes out of the annular plate 30.
[0028]
However, since the annular plate 30 is provided immediately near the spherical support 16 and the annular plate 30 is constantly urged by the coil spring 27 and is in contact with the lower surface of the mantle door 8, the amount of oil leakage is small. It is slight. This oil a travels along the lower surface of the mantle door 8 and the upper surface of the inverted conical ring portion 46 of the dust-proof ring 18 and reaches the lower end thereof. Then, the oil a falls from here into the oil sump chamber 43 below. Naturally, as in the prior art, there is oil that rises on the slope of the inverted conical ring portion 46 against gravity and leaks between the inverted conical ring portion 46 and the seal ring 20, but to the outside of the annular plate 30. Since the amount of oil that leaks is made small, the amount of oil that leaks outside through the seal ring 20 becomes very small.
[0029]
In this embodiment, the mantle door 8 is fitted on the main shaft 7. However, the two 7, 8 can be integrally manufactured by casting or the like. The rotary crusher of this embodiment is of a type called a cone crusher. However, even in a type of a gyrate recrusher or an inertial rotary crusher, the mantle core 8 has a spherical support. The present invention can be applied if it is supported at 16.
[0030]
【The invention's effect】
As described above, according to the present invention, the oil fence at the interface between the mantle door and the spherical support is always in contact with the lower surface thereof regardless of the vertical movement of the mantle door. It can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a schematic sectional front view of one embodiment. FIG. 2 is a cross-sectional view taken along line XX of FIG. 1. FIG. 3 is an enlarged view of a main part of FIG. Description】
DESCRIPTION OF SYMBOLS 1 Airframe 2 Upper frame 3 Lower frame 4 Rotating shaft 7 Main shaft 8 Mantle door 8a Mantle door convex sphere 9 Mantle 10 Bowl liner 11 Inclined hole 12 Bearing 16 Spherical support 16a Spherical support concave sphere 18 Dustproof ring 19 Dustproof wall 20 Seal ring 21 Lifting cylinder 22 Hydraulic chamber 23 Annular convex part 24 Upper hydraulic chamber 25 Lower hydraulic chamber 26 Oil fence 27 Coil spring 28 Lower ring 29 Upper ring 30 Annular plate 31 Notch 32 Oil groove 36 Coil spring 38 Oil supply hole 41 Discharge hole 42 Gap 45 Discharge hole 46 Inverted conical ring part 47 Rotating body a Lubricating oil P Crushed object

Claims (4)

In the vertical direction of the rotating shaft 4 provided on the body frame 1, mounted for gyratory eccentrically mantle core 8, wherein the body frame 1 attached to Bauru liner 10 opposite the mantle 9 of the mantle core 8, wherein The mantle door 8 is supported on the spherical support 16 provided on the body frame 1 around the rotation shaft 4 by slidably fitting the lower convex spherical surface 8a thereof to the outer peripheral edge skirt portion 17 of the mantle door 8 and the rotation. Dust prevention means is provided between the body frames around the shaft 4 to prevent dust from entering the sliding surfaces of the spherical support 16 and the lower convex spherical surface 8a. In the rotary type crusher that rotates between the mantle 9 and the bowl liner 10 by rotating the rotary 8, the lubricating oil a sent to the sliding surfaces of the spherical support 16 and the lower convex spherical surface 8 a is removed. Flying towards A boom structure for preventing the fall,
An oil fence 26 is attached around the entire surface of the spherical support 16 on the rotating shaft 4 side of the dustproof means . The oil fence 26 has an upper end in contact with the convex spherical surface 8a of the mantle door 8 and has a contact therewith. An oil fence structure for a rotary crusher, characterized in that it has an elasticity in a contact direction and follows a vertical movement of a mantle door 8 to maintain a contact state. 2. The swiveling type according to claim 1, wherein the oil fence is maintained in the abutting state by being biased in the direction of the mantle door 8 by a spring 27 provided on the spherical support 16. 3. Crusher oil fence structure. An annular ring 29 is fixed around the entire lower edge of the cylindrical annular plate 30 over the entire periphery of the spherical support 16, and the annular ring 29 is fitted to the outer peripheral surface of the spherical support 16 so as to be vertically movable, The spring 27 for urging the annular ring 29 upward is provided between the annular ring 29 and the spring seat 28 of the spherical support 16, and the upper end of the tubular annular plate 30 is moved by the spring 27. 3. The oil fence structure of a rotary crusher according to claim 2 , wherein the oil crusher is in contact with the convex spherical surface 8a. An annular notch 31 is formed on the outer periphery of the spherical support 16, and a gap 42 is formed above the notch 31 between the oil fence 26 and the outer peripheral surface of the spherical support 16. Further, the spherical support 16 is formed with a lower communication hole 34 extending downward from the notch 31, and the lubricating oil a of the notch 31 is discharged to the outside through the lower communication hole 34. The oil fence structure of a rotary crusher according to any one of claims 1 to 3, wherein:

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